code: def test_shard_map(self):
      mesh = jtu.create_global_mesh((4, 2), ("x", "y"))
      np_inp = np.arange(16).reshape(8, 2)
      s = NamedSharding(mesh, P("x", "y"))
      inp = jax.device_put(np_inp, s)
  
      def g(x):
          return jax.lax.psum(x, "x")
  
      @jax.jit
      def f(x):
          y = x @ x.T
          s_out = shard_map(
              g, mesh, in_specs=P("x", "y"), out_specs=P(None, "y")
          )(y)
          z = s_out.T @ s_out
          return shard_alike(y, z)
  
      out1, out2 = f(inp)
      # From options; P('x', 'y'), P('y'), shard_like chooses the better option.
      self.assertEqual(out1.sharding, s)
      self.assertEqual(out2.sharding, s)
  
imports: import os
  import jax
  import jax.numpy
  import numpy
  from absl.testing import absltest
  from jax._src import xla_bridge
  from jax._src import test_util
  from jax.sharding import NamedSharding, PartitionSpec
  from jax.experimental.shard_alike import shard_alike
  from jax.experimental.shard_map import shard_map
  from jax._src.lib import xla_extension_version
  from jax import config
label_desc: Use image node_id 8 for calling the ShardAlikeTest obj's underlying member method code with example usage: obj.test_shard_map() and returns: jax, shard_alike